Why is there a color difference between the cup coating and the logo

2024-01-12

When customers customize the color or logo of a thermos cup and get the finished product, they will always feel that the color of the finished product/logo is  slightly different from their expectations. This may not be the manufacturer’s problem.

First, you must understand what chromatic aberration is. Color difference refers to the visual color difference between two color samples, that is, chroma difference, brightness difference and hue difference, which are caused by the physical properties of light and the visual response of the human eye.Therefore, part of the color difference may be caused by visual differences, and part of it may be due to various objective factors.

When we directly show the color or logo we want to the merchant in the form of a picture, the color mode of the photo is usually RGB (a combination of the three primary colors of red, green, and blue). This mode is widely used in electronic displays (computers) and digital cameras, etc. equipment. When printing a logo, the RGB color mode is usually converted to the CMYK color mode (a combination of four colors: cyan, magenta, yellow, and black). When printing, the required color is produced by superimposing different proportions of color inks. The color range of CMYK is relatively narrower than the color range of RGB, so color difference will occur when the color mode is converted. This color difference is generally not particularly obvious, but in practice, we found that pink and purple colors are produced after color mode conversion. The color differences are huge (a certain pink even turned to lavender after changing the color mode). If you want the color of the finished product to be more accurate, you can provide the corresponding Pantone color number (spot color printing, used in situations where high-precision color matching is required). Even so, there is still no guarantee of a 100% match.

Different color modes are not the only cause of color difference. Different viewing angles and light effects can also make the same color look different.

If the same cup is exposed to different lights, its coating will appear in different colors. This is a very simple principle of light refraction. After all, our eyes are not 100% precise instruments. Therefore, you can ask merchants to provide product pictures from different angles for comparison and confirmation.

In addition, different materials can also cause color differences. For example, for the popular motivational plastic sports water bottle, many customers require that the color of the silicone part of the lid correspond to the color of the bottle. However, due to the different materials of the two parts, even if the same Pantone color is used, it may look very different. difference.

Of course, color difference is not a universal shield. When using Pantone colors, the color difference is generally controlled within 10%, which is a range that is difficult to distinguish with the naked eye. When the color difference is very obvious and the same material is used, it is likely to be a production problem.

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